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74VHC540 PDF 데이터시트 ( Data , Function )

부품번호 74VHC540 기능
기능 Octal Bus Buffer
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74VHC540 데이터시트, 핀배열, 회로
MC74VHC540
Octal Bus Buffer
Inverting
The MC74VHC540 is an advanced high speed CMOS inverting
octal bus buffer fabricated with silicon gate CMOS technology. It
achieves high speed operation similar to equivalent Bipolar Schottky
TTL while maintaining CMOS low power dissipation.
The MC74VHC540 features inputs and outputs on opposite sides
of the package and two ANDed activelow output enables. When
either OE1 or OE2 are high, the terminal outputs are in the high
impedance state.
The internal circuit is composed of three stages, including a buffer
output which provides high noise immunity and stable output. The
inputs tolerate voltages up to 7.0 V, allowing the interface of 5.0 V
systems to 3.0 V systems.
Features
High Speed: tPD = 3.7 ns (Typ) at VCC = 5.0 V
Low Power Dissipation: ICC = 4.0 μA (Max) at TA = 25°C
High Noise Immunity: VNIH = VNIL = 28% VCC
Power Down Protection Provided on Inputs
Balanced Propagation Delays
Designed for 2.0 V to 5.5 V Operating Range
Low Noise: VOLP = 1.2 V (Max)
Pin and Function Compatible with Other Standard Logic Families
Latchup Performance Exceeds 300 mA
ESD Performance: HBM > 2000 V; Machine Model > 200 V
Chip Complexity: 124 FETs or 31 Equivalent Gates
These Devices are PbFree and are RoHS Compliant
DATA
INPUTS
OUTPUT
ENABLES
2
A1
18
Y1
3
A2
17
Y2
4
A3
16
Y3
5
A4
6
A5
15
Y4
14
Y5
INVERTING
OUTPUTS
7
A6
13
Y6
8
A7
12
Y7
9
A8
OE1 1
11
Y8
OE2 19
Figure 1. Logic Diagram
© Semiconductor Components Industries, LLC, 2011
May, 2011 Rev. 5
1
http://onsemi.com
MARKING
DIAGRAMS
20
1
1
SOIC20
DW SUFFIX
CASE 751D
VHC540
AWLYYWWG
20
1
TSSOP20
DT SUFFIX
CASE 948E
VHC
540
ALYWG
G
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = PbFree Package
PIN ASSIGNMENT
OE1 1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 VCC
19 OE2
18 Y1
17 Y2
16 Y3
15 Y4
14 Y5
13 Y6
12 Y7
11 Y8
FUNCTION TABLE
OE1
Inputs
OE2
A
Output Y
LLL
L LH
HXX
XHX
H
L
Z
Z
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 5 of this data sheet.
Publication Order Number:
MC74VHC540/D




74VHC540 pdf, 반도체, 판매, 대치품
A 50%
tPHL
Y 50% VCC
Figure 2.
MC74VHC540
SWITCHING WAVEFORMS
VCC OE1 or OE2
GND
tPLH
Y
Y
50%
tPZL tPLZ
50% VCC
tPZH tPHZ
50% VCC
Figure 3.
VCC
50%
GND
HIGH
IMPEDANCE
VOL +0.3V
VOH -0.3V
HIGH
IMPEDANCE
DEVICE
UNDER
TEST
TEST
POINT
OUTPUT
CL*
TEST CIRCUITS
DEVICE
UNDER
TEST
TEST
POINT
OUTPUT
1kΩ
CL*
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ AND tPZH.
*Includes all probe and jig capacitance
Figure 4.
*Includes all probe and jig capacitance
Figure 5.
INPUT EQUIVALENT CIRCUIT
INPUT
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74VHC540 전자부품, 판매, 대치품
MC74VHC540
PACKAGE DIMENSIONS
SOIC20
DW SUFFIX
CASE 751D05
ISSUE G
DA
q
20 11
E
1 10
20X B
B
0.25 M T A S B S
18X e
A
SEATING
A1
PLANE
T
C
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE PROTRUSION SHALL
BE 0.13 TOTAL IN EXCESS OF B DIMENSION AT
MAXIMUM MATERIAL CONDITION.
MILLIMETERS
DIM MIN MAX
A 2.35 2.65
A1 0.10 0.25
B 0.35 0.49
C 0.23 0.32
D 12.65 12.95
E 7.40 7.60
e 1.27 BSC
H 10.05 10.55
h 0.25 0.75
L 0.50 0.90
q 0_ 7 _
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any
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time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under
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PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
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Phone: 3036752175 or 8003443860 Toll Free USA/Canada
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http://onsemi.com
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ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your loca
Sales Representative
MC74VHC540/D

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